Β桶状结构

β桶状结构（英语：Beta barrel）是蛋白质的一种三级构造。它由多条β折叠带通过反平行重叠成桶状，两段则由肽链残基间的氢键结束。常见采取这种构造的蛋白有孔蛋白、跨膜蛋白以及其他需要与非极性分子打交道的蛋白。

在β桶中，β折叠带往往同时带有亲水与疏水性残基。根据外部环境与管道需要，再将内外分别整理成亲水或疏水的管道面。

参考文献

外部链接

Explanation of all-beta topologies : "orthogonal beta-sandwiches" are beta-barrels (as defined in this article); "aligned" beta-sandwiches" correspond to beta-sandwich folds in SCOP classification.
all-beta folds in SCOP database (folds 54 to 100 are water-soluble beta-barrels).
CATH database - folds and homologous superfamilies within the beta-barrel architecture. 
General classification and images of protein structures from Jane Richardson lab
Images and examples of transmembrane beta-barrels 
Stockholm Bioinformatics Center review of transmembrane proteins
The Lipocalin Website
The OMPdb database for beta-barrel proteins

蛋白質結構
蛋白质域
蛋白质折叠